This paper outlines an improved squeeze film damper which reduces significantly the dependence of the stiffness of conventional squeeze film dampers on the vibration amplitudes. This improved damper consists of a conventional squeeze film damper with a flexibility supported outer ring. This secondary flexible support is considered to be massless, and to have a constant stiffness and damping. Assuming the short bearing approximation and the ‘π’ film cavitation model, the performances of this damper in preventing bistable operation and sub-synchronous and nonsynchronous motions are theoretically demonstrated for a rigid rotor supported on a squeeze film damper. Blade-loss simulations are carried out numerically.

Issue Section:
Research Papers
Topics:
Blades, Dampers, Rotors, Simulation, Stiffness, Approximation, Bearings, Cavitation, Damping, Vibration
1.
Cooper, S., 1963, “Preliminary Investigation of Oil Films for the Control of Vibration,” Proc. I MechE, Lubrication and Wear Convention, pp. 305–315.
2.
Feng
N. S.
, and
Hahn
E. J.
,
1989
, “
Inlet Pressure and Cavitation Boundary Effects on the Orbit Jump Phenomenon in Squeeze Film Damper Operation
,”
Proc. I MechE, Part C, Journal of Mechanical Engineering Science
, Vol.
203
pp.
209
–
217
.
3.
Fleming
D. P.
,
1985
, “
Dual Clearance Squeeze Damper for High Load Conditions
,”
ASME JOURNAL OF TRIBOLOGY
, Vol.
107
, pp.
274
–
279
.
4.
Hahn
E. J.
,
1979
, “
Stability and Unbalance Response of Centrally Preloaded Rigid Rotors Mounted in Journal and Squeeze Film Bearings
,”
ASME JOURNAL OF LUBRICATION TECHNOLOGY
, Vol.
101
, pp.
120
–
127
.
5.
Heshmat, H., and Walton, J. F., 1990, “Advanced Multi-squeeze Film Dampers for Rotor Vibration Control,” ASME/STLE 1990 Conference, Pre-Print No. 90-LTC-3E-1.
6.
Holmes
R.
,
1985
, “
The Control of Engine Vibration Using Squeeze Film Dampers
,”
ASME Journal of Engineering for Power
, Vol.
105
, p.
525
525
.
7.
Magge
N.
,
1975
, “
Philosophy, Design and Evaluation of Soft-Mounted Engine Rotor Systems
,”
Journal of Aircraft
, Vol.
12
, p.
318
318
.
8.
McLean, L. J., and Hahn, E. J., 1978, “The Transient Response of a Balanced Rigid Rotor Bearing in Squeeze Film Supported Journal Bearing,” Topics in Fluid Film Bearing and Rotor Bearing System Design and Optimization, ASME, pp. 203–229.
9.
Mohan
S.
and
Hahn
E. J.
,
1974
, “
Design of Squeeze Film Damper Supports for Rigid Rotors
,”
ASME Journal of Engineering for Industry
, Vol.
96
, pp.
976
–
982
.
10.
Pinkus, O. and Sternlicht, B., 1961, Theory of Hydrodynamic Lubrication, McGraw-Hill, New York.
11.
Rudiger, S., 1988, From Equilibrium to Chaos: Practical Bifurcation and Stability Analysis, Elsevier Science Publishing, New York.
12.
Simandiri
S.
, and
Hahn
E. J.
,
1976
, “
Effect of Pressurization on the Vibration Isolation Capability of Squeeze Film Bearings
,”
ASME Journal of Engineering for Industry
, Vol.
98
, pp.
109
–
117
,
13.
Tecza
J.
, and
Walton
J. F.
,
1993
, “
A Chambered Porous Damper for Rotor Vibration Control: Part I-Concept Development
,”
ASME Journal of Engineering for Gas Turbines and Power
, Vol.
115
, pp.
360
–
365
.
14.
Walton
J. F.
, and
Heshmat
H.
,
1993
, “
Rotordynamic Evaluation of an Advanced Multi-squeeze Film Damper-Imbalance Response and Blade-Loss Simulation
,”
ASME Journal of Engineering for Gas Turbines and Power
, Vol.
115
pp.
347
–
352
.
15.
Walton
J. F.
, and
Martin
M.
,
1993
, “
A Chambered Porous Damper for Rotor Vibration Control: Part Il-Imbalance Response and Blade-Loss Simulation
,”
ASME Journal of Engineering for Gas Turbines and Power
, Vol.
115
, pp.
366
–
371
.
16.
White, D. C., 1970, “Squeeze Film Journal Bearings,” Ph.D. thesis, Churchill College, The University of Cambridge.
17.
Zhao, J. Y., Linnett, I. W., and McLean, L. J., 1992, “Stability and Bifurcation of an Eccentric Squeeze Film Damper-Mounted Rigid Rotor,” To be published by ASME Journal of Vibration and Acoustics, Paper No: JVA-92-100.
18.
Zhao
J. Y.
and
Hahn
E. J.
,
1993
, “
Subharmonic, Quasi-Periodic and Chaotic Motions of a Rigid Rotor Supported on an Eccentric Squeeze Film Damper
,”
IMechE, Part C, Journal of Mechanical Science
, Vol.
207
, pp.
383
–
392
.
19.
Zhao, J. Y., Linnett, I. W., and Hahn, E. J., 1994, “Unbalanced Response of a Rigid Rotor Supported on an Improved Squeeze Film Damper,” ASME Paper No. 94-GT-I09, 7pp.
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